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Pages: 25-32+134
Year: Issue:  1
Journal: Acta Anatomica Sinica

Keyword:  房室结羊心染色技术weber冠状血管实验方法嗜银性副交感内神威神;
Abstract: Observations on the innervation of the atrio-ventricular node of the dog andthe lamb by Weber’s silver impregnation technique can be summarized asfollows. (1) The atrio-vendicular node of the dog and the lamb receives a rich in-nervation, particularly in the latter. With the aid of a reconstruction of theA-V node on the superposed glass plates, the topography of the nerves in thenode in relation to the cardiac ganglia in the interauricular septum of the heartof the lamb is clearly demonstrated. (2) With Weber’s silver impregnation technique, one can distinguish 3 kindsof nerve fibers in the A-V node: the coarse, deeply impregnated fibers as thesensory; the fine, black fibers as the parasympathetic post-ganglionic; and thefinest, pale ones as the sympathetic post-ganglionic fibers. (3) The sensory and parasympathetic preganglionic fibers degenerate after the vagotomy; while the sympathethic post-ganglionic ones degenerate after theremoval of the middle cervical and Stellate ganglia. The parasympatheticpost-ganglionic fibers remain intact in spite of these operations. (4) The sensory endings in the A-V node are seen in one or more termin-al grains, or in the form of "grappe de raisin". The majority of the sympathe-tic and parasympathetic post-ganglionic fibers terminate in metaterminal appara-tuses of Weber. The intrapotoplasmic ending in muscular fibers of the A-Vnode is also observed.
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